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Coherent and incoherent XUV emission in helium and neon, laser-driven plasmas

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5 Author(s)
Crane, J.K. ; Lawrence Livermore Nat. Lab., California Univ., CA, USA ; Perry, M.D. ; Strickland, D. ; Herman, S.
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The authors present results of measurements of high-order harmonic generation and XUV spontaneous emission in helium and neon plasmas excited by a short pulse laser at intensities between 1014 and 5×1017 W/cm2. They compare the observed behavior of the harmonics with recent single atom calculations in helium. A wavelength dependence to the efficiency of harmonic generation that has not been previously reported is observed. Line emission from excited state transitions in Ne7+ in a short pulse laser-driven plasma is also observed. In particular, strong emission and a rapid recombination rate for the 9.8-nm (3d-2p) transition that is a possible candidate for a recombination-pumped X-ray laser is shown

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Plasma Science, IEEE Transactions on  (Volume:21 ,  Issue: 1 )